Window adjustment lock



c. E. sHATTUcK 2,114,910

4WINDOW ADJUSTMENT LOCK April 19, 19m

Filed NOV. 9, 1936 E5 f. .SWW-ack d AE Tmvfy Patented Apr. 19, 1938 UNITED STATES PATENT OFFICE 4 Claims.

This invention relates to window locking devices and has for its object to provide a novel form of adjustable window lock with which a window may be locked or the movement of the upper and lower sash limited for a restricted opening of the window for Ventilating purposes without providing an unauthorized entrance thru the window from the outside thereof.

Another object of this invention is to provide an adjustable window lock of extremely simple and sturdy construction which may be quickly and easily attached to the window jamb in a partially concealed manner so as not to deface the wood work or be objectionable in its appearance.

A further object of this invention is to provide an adjustable window lock with means for detachably mounting it to the window frame.

All these and other objects and attendant advantages of this invention will become more readily apparent from the detailed description thereof which follows, reference being had to the accompanying drawing in which Figure 1 is a front elevation of a portion of a window equipped with my window adjusting lock.

Figure 2 is a vertical sectional view of the window taken on line Zx-Zx of Figure l.

Figure 3 is an enlarged detail perspective View of the window adjustment lock.

Figure 4 is a detail front elevation of the combined supporting and guide member of the window adjustment lock.

Figure 5 is a diagrammatic perspective view of the locking members of the window adjustment lock in one locking position.

Figure 6 is a similar view with the locking members in another locking position.

Figure 7 is a similar View with the locking members in a third locking position.

In the several figures of the drawing like reference numerals indicate like parts.

' The window adjustment lock forming the subject matter of my invention makes it possible to lock the window shut without the aid of other locking means or allow the window to be opened for Ventilating purposes by limiting the movement of either one or the other or both of the upper and lower sash oi the window. In this way a partial opening of the window for ventilation will not permit a further opening of the win-dow ior the purpose of securing an unauthorized entrance therethru from the outside thereof.

The window adjustment lock is constructed s0 as to be quickly and easily attached in a manner that partially conceals it in the window casing and will not in any way deface the wood work thereof. It is detachably mounted and the locking members which engage and lock the window sash also lock the window adjustment lock to the window casing so that it cannot be removed except from the inside of the window and only by Vone who is familiarin the mounting of it. Only one lock is used for limiting the movement of either the upper or lower sash and this lock is so designed that it may be used on both old and new windows made up of an upper and lower sash movable individually and with relation to each other.

As illustrated in the several figures of the drawing, the window adjustment lock comprises a guide sleeve l which, at the top and bottom, is provided with the mounting flanges 2 and 3. The latter are slightly offset from the guide sleeve and the mounting an-ge 2 at the top of the guide sleeve has the elongated opening 4 therein while the mounting ange 3 at the bottom of the guide sleeve is bifurcated by a slot 5. In mounting the guide sleeve a suitable screw with a screw head 6 is used for engagement by the bifurcated mounting flange 3 and a screw or pivot pin with an elongated olf-set extension 'l is used for engagement by the mounting flange 2. The oiset eX- tension of the screw or pivot pin 'i is adapted to pass thru the elongated opening 4 in the locking flange and Yis then turned to one side as illustrated in Figure 4 to lock this ange against the window jamb and at the same time keep the bifur cated Vlocking ange 3 locked behind the screw head 6.

Intermediate the guide sleeve I is located a bolt sleeve 8 and in this sleeve is mounted to rock and slide endwise the bolt 9 so as to have it project into the guide sleeve I. This bolt is provided with the handle I0 which'projects radially therefrom intermediate the ends thereof. The bolt sleeve 8 is cut out to provide a bayonet slot Il therein and the handle I0 projects thru this slot to permit it to swing and rockthe bolt or move laterally and siide the bolt endwise in the sleeve.

The sliding bar l2 is bent at the top in order that its outer end may engage under the top rail iii of the upper sash at the corner of the window. By raising or lowering the locking bar l2, the upper sash may thus either be held closed in the window frame or allowed to open to a point where the top rail of the sash engages the outwardly bent portion of the locking bar and prevents a further movement thereof in order to provide a limited opening in the upper portion of the window.

Sliding bar I3 is bent outwardly at the lower Cil end so as to engage the top rail I'I of the lower sash. By raising and lowering the locking bar I3 the lower sash may thus either be held closed in the window frame or allowed to be raised to a point where the top rail of the lower sash engages the outwardly bent portion of the locking bar I3 and prevent a further movement thereof so as to provide but a limited opening in the lower portion of the window.

By adjusting either one or the other or both of the locking bars I2 and I3, the upper and lower sash may thus be held to either lock the window shut or allow the upper or lower or both the upper and lower sash to open a limited distance for Ventilating purposes without permitting the window to '5e opened further for an unauthorized entrance therethru.

The sliding or locking bars are locked and unlocked for adjustment by means of the locking bolt S which is operated by its handle Ill. This locking bolt is adapted to rock and move endwise in the locking sleeve 8 which is located on the guide sleeve I so as to have one side of the end portion of the bolt project into the guide sleeve at right angles thereto. In this way the bolt is adapted to engage into the semi-cylindrical notches Ill and I5 of the sliding bars I2 and i3 and in so doing hold these bars against movement in the guide sleeve. For the purpose of releasing the sliding bars to permit their adjustment against the upper and lower sash the bolt is provided with a notch I9 which is arranged and dimensioned so that when the bolt is turned into the position shown in Figure 6 the notch faces the sliding bar I2 and permits it to move up and down therein for adjustment against the upper sash. When this is done the bolt 9 is turned to have the bolt at the back of the notch IQ engage into whichever of the semi-cylindrical notches in the sliding bar happens to be pre- .sented for engagement in this desired position of the sliding bar.

Adjustment of the sliding bar I3 is made possible by moving the locking bolt 9 endwise into the position illustrated in Figure 7. In this position the end of the locking bolt is moved away from the sliding bar I3 so as to permit this bar to freely move up and down in the guide sleeve to the position in which it is to hold the lower sash by its engagement therewith. After the sliding bar is set the sliding bolt is moved back into the position illustrated in Figures 3 and 5 in which the sliding bolt engages the notches of both sliding bars to hold them locked in their adjusted position.

After the sliding bars are adjusted and locked in this manner the handle I0 may be removed from the locking bolt making it impossible for any one not having access to the handle to unlock the sliding bars and move the window sash except as permitted by the window adjustment lock.

The sliding bars I2 and I3, when inserted in the guide sleeve I, are located over the mounting flanges il and 3 of the guide Sleeve and their fastening means in order that the guide sleeve may not be removed from the window casing while the sliding bars are held locked therein.

The window adjustment lock is mounted in the grooved portion of the jamb of the window casing to one side of the window cord 20 where the guide sleeve and the sliding bars are concealed from View except for the operating handle of the locl and the projecting ends of the sliding bars at the top and bottom thereof. In

this way no screw or other fastening means need be inserted into the casing or sash where it will be visible and mar the finish thereof. In fastening the window lock in place for the first time only a screw driver and a pair of pliers are needed and anyone will be able to quickly fasten the lock in place. After the lock has been fastened it may be removed and re-attached without the use of tools by simply turning the elongated head of the locking member l in line with the elongated opening 4 in order to release the ange 2 and permit the guide sleeve to be moved away from it and then raised for the disengagement of the hifurcatcd mounting iiange 3 from under the screw head 6. As illustrated in Figure 3 anges E and 3 of the guide sleeve I are offset so that a tool such as a screw driver may be inserted between the ange 2 and the rear of the bar I3 in order to turn the elongated locking head of the fastening screw at the top of the guide sleeve I when fastening or removing the window adjustment lock.

From the foregoing it will be apparent that I have devised a new and useful window adjustmont lock which embodies the features and advantages set forth in the specification and while I have, in the present instance, shown and described preferred embodiments thereof which will give in practice satisfactory and reliable results, it is to be understood that these embodiments are susceptible of modification without departing from the spirit or scope of the invention.

I claim:

1. A window adjustment lock adapted to be mounted on a window frame and comprising a guide sleeve, a pair of locking bars mounted to slide side by side in said locking sleeve and having spaced notches in the sides thereof to have one of the notches of one of said locking bars align with one of the notches in the other locking bar, a locking bolt having a groove in the side thereof mounted to rock and move endwise intermediate of said guide sleeve at right angles thereto so as to engage into or disengage from the notches in said locking bars and means carried by said locking bars for engagement with the sash movable in the window frame.

2. A window adjustment lock adapted to be mounted on a window frame and comprising a guide sleeve, a pair of locking bars mounted to slide side by side in said locking sleeve and having spaced notches in the sides thereof to have one of the notches of one of the locking bars align with one of the notches in the other locking bar, a bolt sleeve projecting from said guide sleeve at right angles thereto and intermediate the ends thereof, a locking bolt having a groove in the side thereof mounted to rock and move endwise in said bolt sleeve so as to have one side of said locking bolt engage into the notches of said locking bars to hold said locking bars against movement in said guide sleeve, or withdraw the end of said locking bolt from engagement out of the notch of one of said locking bars for the individual movement thereof or have the groove in said locking boit face the other of said locking bars to permit its movement thorethru.

3. A window adjustment lock as set forth in claim 2 in which said bolt sleeve is provided with a bayonet slot in the side thereof and said bolt is provided with a handle which projects thru said bayonet slot and is guided thereby for a rocking or endwise movement of said bolt into its three locking positions.

4. A window adjustment lock as set forth in claim 1 in which said guide sleeve is provided with a mounting flange at one end having an elongated opening therethru and a mounting flange at the other end having a slot therein to have a holding member With a xed head engage and hold the slotted mounting ange and have anges.

CHARLES E. SHATTUCK. 

